Infiniti FX35 Vehicle fault code P0136? 250-24403 Oxygen sensor downstream problem analysis

When your Infiniti FX35 triggers a fault code P0136, it’s essential to understand the underlying issue, especially when it relates to the 250-24403 oxygen sensor downstream. In this article, we will delve into the significance of this fault code in an Infiniti FX35 and analyze the problems associated with the 250-24403 oxygen sensor downstream.

Decoding Fault Code P0136 in the Infiniti FX35

Fault code P0136 in an Infiniti FX35 refers to an issue with the downstream oxygen sensor, specifically the 250-24403 oxygen sensor downstream. This code indicates that the sensor is not functioning within its expected parameters, potentially affecting the vehicle’s performance, fuel efficiency, and emissions. Understanding the nature of this fault is crucial for effective diagnosis and repair.

Subtitle 2: The Role of the 250-24403 Oxygen Sensor Downstream

The 250-24403 oxygen sensor downstream is a critical component of the Infiniti FX35’s emissions control system. Its primary function is to monitor the levels of oxygen in the exhaust gases after they have passed through the catalytic converter. This information is relayed to the engine control unit (ECU), allowing it to make necessary adjustments to the air-fuel mixture for optimal performance and emissions control.

When this 250-24403 oxygen sensor downstream malfunctions, it can lead to various issues, including reduced fuel efficiency, increased emissions, and even poor engine performance. These problems can potentially result in a failed emissions test and increased environmental impact.

Diagnosing and Addressing 250-24403 Oxygen Sensor Downstream Problems

If you encounter fault code P0136 in your Infiniti FX35, it’s crucial to take appropriate steps to diagnose and address the issue:

Check Wiring and Connections: Begin by inspecting the wiring and connections associated with the 250-24403 oxygen sensor downstream. Loose or damaged wires can lead to erratic sensor readings.

250-24403 oxygen sensor downstream Replacement: If the wiring and connections are in good condition, it may be necessary to replace the sensor itself. Ensure that you choose a high-quality replacement sensor compatible with your Infiniti FX35.

Clearing Fault Codes: After addressing the problem, use a diagnostic tool to clear the fault codes stored in the ECU. This step ensures that the issue has been resolved.

Monitor Performance: After replacing the sensor or fixing the wiring issue, monitor the vehicle’s performance, fuel efficiency, and emissions to ensure that the problem has been successfully addressed.


In conclusion, when your Infiniti FX35 displays fault code P0136 related to the 250-24403 oxygen sensor downstream, it’s essential to take prompt action. Understanding the role of this sensor and its significance in emissions control and engine performance is key to diagnosing and addressing the issue effectively. By following the necessary steps for diagnosis and repair, you can ensure that your Infiniti FX35 continues to run smoothly while minimizing its environmental impact.

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